$where = array();
$where['table_name'] =C('db_prefix').'99m';
$where['column_name']='username';
C('db_prefix','');
$data = M('information_schema.columns')->where($where)->fetchSql(true)->find();
生成的SQL语句竟然没有where语句了,这是什么问题?
难道information_schema.columns很特别?